.page{
    text-align: center;
    width: 100%;
    padding-top: 5%;
}

.bgi{
    width: 456px;
    height: 262px;
    margin: auto;
}
.bg403{
    background-image: url('../images/403.png');
}
.bg404{
    background-image: url('../images/404.png');
}
.bg500{
    background-image: url('../images/500.png');
}